HP PAvilion 712a soundcard DIED after reformatting.

Hi I recently reformatted my computer and I didn't know that my HP had the recovery section... As you can probably see I am a total NOOB/Newbie... I was wondering if anybody had the recovery disks or know what driver it is that I am supposed to be looking for. My video card was not working either but I have now got that to work. It is only the sound card and a SM bus controller that I need drivers for. Can anybody tell me what a SM bus controller is??? I think the in built soundcard is a AC'97 but I am not sure if that is the driver file name or the actual sound cards name. I have spent many many hours trying to figure this out and I am totally lost. I have contacted tech support days and days ago without any feedback.